Sylvania



Feb. 3, 1931. LAZlCH I 1,790,671

ELECTRI CAL RELAY Fild June 28, 1929 4 Sheets-Sheet 1 INVENTOR I Brqnk 4Q5LW,

Feb. 3, 1931. LAZICH 1,790,671

ELECTRICAL RELAY Filed June 28, 1929 4 Sheets-Sheet 2 to q INVENTOR'.Brqnka L4 ale/1,

Feb. 3, 1931.

Filed June 28, 1929 4 Sheets-Sheet 5 1 I Ian I I 52 5 :2 z z a gsa gINVENTOR'. Bran/(.0 hallo v,

3, 1931. zgc 1,790,671 v ELECTRICAL RELAY Filed June 28, 1929 4Sheets-Sheet 4 1 Q INVENTOR-. P4 4%: BrankqLaz/ch iii) Patented Feb. 3,1931 UNITED STATES FATE NT OFFICE BRANKO LAZICE, or rrr'rsnunen,PENNSYLVANIA, ASSIGNOB T arm: uNroN swn'ea & SIGNAL COMPANY, orSWISSVALE, PENNSYLVANIA, a CORPORATION or rm- SYLVANIA.

ELECTRICAL RELAY Application filed .Tune 28,

My invention relates to electrical relays, and particularly to polarizedrelays of the type comprising aneutral armature responsive to thepresence and absence of operating current, and a polarized armatureresponsive to the polarity of theoperating current.

I will describe one form of relay embodying my invention, and will thenpoint out the novel features thereof in claims.

In the accompanying drawings, Fig. 1 is a View showing, in sideelevation, one form of relay embodying my invention. Fig. 2 is a viewshowing therelay shown in Fig. 1 as it appears when viewed from theright in Fig. 1. Fig. 3 is a bottom view of the relay shown in Figs. 1and 2. F ig..4 is an isometric view illustrating the magnetic structureof the relay shown in Figs. 1 and 2. Fig. Sis a bottom view of theapparatus shown in Fig. 4.

' Similar reference characters refer to similar parts in each of theseveral views.

Referring first to Figs. 1,2, and 3, the relay comprises a top plate Aof suitable insulating material, such as porcelain or bakelite, whichserves as a support for all of the operating parts of the relay. Mountedon the top plate A is an electromagnet B, which comprises, as usual, aair of parallel cores 1 and 1 connected at t 1e top by a back strap 2,each core being rovided with a Winding 3, the windings 3 oeing connectedin series in the usual manner. The cores 1 and 1 pass through the topplate A, and terminate, on the underside of the top plate, inenlargedpole pieces 4 and 4 respectively.

Also mounted on the top plate A is'a constantly magnetized core 5, hereshown as a permanent magnet. The upper end of the 3 core 5 is ground tothe same true plane as the underside of the back strap 2 and engagestheunderside of the back strap 2, while the lower end of the core 5passes through the top plate A and terminates in a bifurcated pole piece6 located on the underside of the top plate A. The arrangement of theseparts is shown most clearly in Figs. 4 and 5.

The electromagnet B controls a neutral armature 7 of magnetizablematerial. The armature 7 is pivotally supported by two 1928. Serial No.374,381.

pivot pins 9 threaded through the downwardly projecting lugs of abracket 8 which is attached to the sides of the pole pieces 4 and 4 bymeans of screws 10. With the armature 7 supported in this manner, itwill beevident that this armature will move toward or away from the polepieces 4 and 4 in accordance with the pressure or absence of operatingcurrent in windings 3 of electromagnet B. It will also be evident thatthis armature is unaffected by the permanently magnetized core 5 becausethe pole piecev 6 of the permanently magnetized core 5 is spacedagonsiderable distance from the armature 7.

A plurality of contact fingers 11, here shown as six in number, areattached to the underside of the armature 7 by supports 12 ofmouldedinsulation, each support 12 carrying two contactfingers. Referrin toFig. 1, when electromagnet B is energized so that armature 7 is drawnupwardly toward pole pieces 4* and 4*, into the position shown in thedrawing, the contact fingers 11 each engage a front contact 13 attachedto a terminal post 14 mounted on the top plate A.

lVhen electromagnet B is de-energized, however, so that armature! dropsaway from the pole pieces 4 and 4 under the influence of gravity, thecontact fingers 11 then each engage a back contact 15 attached to aterminal post 16 mounted on the top plate A. Electrical connections areseparately made to the contact fingers 11 by means of a plurality offlexible connectors 17, each of which is connected at one end with acontact finger 11 and at the other end with a stra 18' at tached to aterminal post 19 mouutc on the its opposite ends. The armature 20 isarranged to swing toward one or the other of these pole faces, stops 23and 23 (Fig. 2), 7

the polarity of the operatin current which is supplied to electromagnetB. When the armature is once swung toward one of the pole faces, it willremain in the position which it then occupies until current of theopposite polarity to that which caused it to swing toward the said poleface is supplied to electromagnet B. In other words, deenergizingelectroinagnet B will not affect the polarized armature 20.

The polarized armature 20, as shown in Figs. 2 and 3, is provided at oneend with two contact fingers 25*, and at the other end, with two similarcontact fingers 25 but any other number of contact fingers may beprovided at either end. Each two contact lingers 25 are fastened to thearmature 20 by means of a support 24 similar to the insulating supports12 by means of which the contact lingers 11 are fastened to the neutralarmature i. lVhen operating current of one relative polarity is suppliedto the windings 3 of electromagnet B so that the polarized armature 20is swung toward the pole face of the extension 22* of the polepiece 45(see Fig. 2), the contact fingers 25 each engage a normal contact 26*,and the contact fingers 25 each engage a normal contact 26 Whenoperating current of the opposite relative polarity is supplied to thewindings 3 of electromagnet B, however, so that armature 20 is swungtoward the pole face of cheertension 22 of the pole piece i the contactfingers 25 then each engage a reverse contact 28 while the contactfingers 25 each engage a reverse contact 28". The normal contact 26 andthe reverse contact 28 are fastened, by means of clamps 34* and'3lrespectively, to terminal posts 27" and 27 mounted on the top plate A.The normal contact 26 and reverse contact 28 are fastened by means ofsupports 29? and 29 respectively, which I will presently describe, toterminal posts 30 and 30 mounted on the top plate A. Electricalconnections are separately made to the contact fingers 25 by means offlexible connectors 31, each of which is attached at one end to acontact fin 'er 25 andat the other end to a member 32 fastened to aterminal post 33 mounted on the top plate A.

Each support 29 comprisesa body portion at having an integral upperportion 6 and an integral lower portion'oJ The upper portion 7) ishorizontal, as best seen in Fig. 1, and is provided with a hole (Z showndotted in Figs. 1 and 2. The hole receives a screw 35 which is screwedinto the associat-ed terminal post 30 to fasten the support in place.The body portion (1 extends downwardly from the upper portion 7) in aplane which is substantially at right angles to the plane of the upperportion 5 as best seen in Fig. 1, and has its longer axis inclined at anacute angle with the plane of the upper portion Z) in the direction ofthe armature 20 best seen in Fig. 2. Both the upper portion Z; and thebody portion a are preferably chaniiel-shaped in order to increase therigidity of the support. The'lower portion 0 extends horizontally towardthe armature 20, with its axis at right angles to the axis of the upperportion 7), as best seen in Fig. 2. The end of the lower portion 0 isbent to form a substantially U-shaped stirrup 0 which receives theassociated contact 26 or 28, as the case may be. T 0 permit verticaladjustment of the associated contact, the vertical sides of the stirrupare provided with registering elongated openings 36, the openings in oneside of the stirrups 29 being partly visible in Fig. 1. A screw 37passes through these openings and through a suitably located hole in theassociated contact, and is screwed into a strap 38. The strap 38 hasears 38 which engage the edges of the contiguous side of the stirrup cto prevent the strap; from turning.

It will time be apparent that l have provided a polarized relay in whichboth the neutral and polarized armatures are pivotally supported in aplane which is parallel to the plane of the top plate A, and which ashere shown extends at right angles to the plane of the cores l and 1*.It will also be apparent thatl have provided a polarized relay in whichthe neutral armature '5 is responsive to the presence and absence ofoperating current in electromagneo B, and not to the polarity of theoperating current in electromagnet B, while the polarized armature 20 isresponsive to the polarity of the operating current supplied toelectromagnet B, and not to the presence or absence of the operatingcurrent in electromagnet B.

One advantage of relay embodying my invention is that the pivot pinswhich support the neutral armature and the pivot pins which support thepolarized armature are located in such positions that after the relay isassembled, they may be readily inspected at any time to locate dirt orother foreign material.

Another advantage of a relay embodying my invention is that the air gapsfor both armatures are visible when the relay is assembled.

Still another advantage of a relayembodying my invention is that thesame type of contacts and pivot pins may be used for both the neutraland polarized armatures.

A further advantage of a relay embodying my invention is that since thepolarized armature is pivotally supported in a plane which extendsparallel to the plane of the top plate, the size of the polarizedarmature is not limited, and any desired number of polar contacts maytherefore be easily provided.

Although I have herein shown and de scribed only one form of relayembodying my invention, it is understood that various changes andmodifications may be made therein within the scope of the appendedclaims without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim is:

1. A relay comprising an electromagnet having two parallel coresconnected together at one end by a back strap and each provided at theother end with an enlarged pole piece, two windings one on each core, afirst armature responsive to the presence and absence of current in saidwindings, a constantly magnetized core having one end in engagement withsaid back strap, and a second armature polarized by said constantlymagnetized core and pivotally supported in a plane extending at rightangles to said cores for swinging motion toward one or the other of saidenlarged pole pieces.

2. A relay comprising a supporting plate, an electromagnet mounted onsaid plate and having two parallel cores extending through said plate,said cores being connected together at one end by a back strap and eachprovided at the other end with an enlarged pole piece, two windings oneon each core, a first armature responsive to the presence and absence ofcurrent in said windings, a constantly magnetized core mounted on saidplate and having one end in engagement with said back strap, and asecond armaturepolarized by said constantl magnetized core and pivotallysupportec in a plane extending parallel to the plane of said plate forswinging motion toward one or the other of said enlarged pole pieces.

3. A relay comprising a plate, an electromagnet mounted on said plateand having two parallel cores extending through said plate, said coresbeing connected together at one end by a back strapand each provided atthe other end with an enlarged pole piece, two windings one on eachcore, a first armature responsive to the presence and absence of currentin said windings, a constantly magnetized core extending through saidplate and having one end in engagement with said back strap and theother end provided with a bifurcated pole piece, and a second armaturepivoted between the bifurcations of said bifurcated pole piecein a planeextending parallel to the plane of said plate for swinging motion towardone or the other of said pole pieces. I

4. A relay comprising an electromagnet having two vertically disposedparallel. cores connected together at one end by a hack strapandeachprovided at the other endwith an enlarged pole piece, twowindings oneon-each core,-afirst armature responsive to the presenceandabsence of current insaid windings, a constantly magnetized corehavingone end in engagement with said back, strap, and a second armaturepolarized by said constantly magnetized core and arranged to swing abouta horizontal axis toward one or the other of said pole pieces inresponse to current of one relative polarity or the other in saidwindings.

5, A relay comprising a top plate, an electromagnet mounted on said topplate and having two vertically disposed parallel cores connectedtogether at their upper ends by aback strap and each provided at theirlower and with an enlarged pole piece located underneath said top plate,two windings one onieachl core, a first armature responsive to theresenee and absenceof current in said win ings, ,a constantly magnetizedvertically disposed core mounted on said top plate and having one end inengagement with said back strap'and the other end terminating in abifurcated pole piece located underneath said top plate, two horizontalpivot pins one screwed through each bifurcation'of said bifurcated polepiece,and a second armature pivotally snpported'on said pivot pins andarranged to swing toward one or the other of said enlarged pole piecesin response to current of one relative polarity or theother insmidwindingsi '6. Arel'ay comprising a top plate, an electrmnagnetmounted on saidtop plate and I having twovertically disposed parallelcores connected together at their upper ends by a back. strap and eachprovided at their lower end with an enlarged pole piece locatedunderneath saidrtop plate, two windings one on each core, a firstarmature responsive to the presence and absence of current in saidwinding 'a constantly magnetized vertically disposed com mounted on saidtop plate having'one'end in engagement'withfsaid back strap and theother end terminating in a bifurcated pole piece located underneath saidtop -.plate,: two, horizontal pivot pins one screwed through each.vbifurcation of said bifurcated pole piece, two integral extensions oneon each of said enlarged pole pieces, and

a second armature pivotally supported on said pivot pins and arranged toswing toward one or the other of said integral extensions.

7. A relay comprising a top plate, an electromagnet mounted on said topplate and having two said top plate, said coresbeing connected togetherat one end by a back strap and each provided at the other end with anenlarged pole piece,

parallel cores extending through two windings one on each core, 1

a first armature responsive to the presence and absence of current insaid windings, a constantly magnetized core mounted on said top plateand having one end in engagement with said back strap, and a secondarmature polarized by said permanently magnetized core and pivotallysupported intermediate its ends in a plane extending parallel to theplane of said top plate for swinging motion toward one or the other'ofsaid enlarged pole pieces.

8. A relay comprising a horizontal top plate, an electromagnet mountedon said top plate and comprisingtwo vertically extending cores connectedtogether at their upper ends by a back strap, each core being providedat its lower end with an enlarged pole piece located on the underside ofsaid top plate, windings on said cores, a neutral armature responsive tothe presence and absence of current in said windings, a constantlymagnetized vertically extending core mounted on said top plate andhaving vits upper end ground to the same true plane as the underside ofsaid back strap and engaging the underside of said backstrap, said corebeing provided on its lower end with a bifurcated pole piece located onthe underside of said top plate, two horizontally disposed pivot pins,one screwed through each bifurcation of said bifurcated pole piece, twoextensions one integral with each of said enlarged pole pieces, apolarized armature pivotally supported at its center on said pivot pinsfor swinging" motion in a vertical plane toward the pole face of one orthe other of said extensions, said polarized a-rmature being providedwith stops to prevent said armature from engaging the pole faces of saidextensions, and contacts controlled by both said armatures. V

9.A relay comprising an electromagnet having a back strap and two spacedpole pieces, a constantly magnetized core having one end engagingsaidback strap and the other end terminating in a bifurcated pole piecelocated between said enlarged pole pieces, a magnetizable' armaturepivotally supported intermediate its ends in said bifurcated pole piecefor swinging motion in the plane of said permanently magnetized core andhaving the ends of said armature adjacent said two enlarged pole pieces,respectively, and contact mechanism controlled by said armature. V

In testimony whereof 'BRANKO LAZICH.

I affix my signature.

